Alarm-clock.



Patented Feb. 5, I901." "A. JUNGHANS.- a

ALARM CLOCK.

(Applicmion filed Oct. 16, 1900.)

(No Model.)

UNITED STATES PATENT OFFICE.

ARTHUR JUNGHANS, OF SCHRAMBERG, GERMANY.

ALARM-CLOCK.

SPECIFICATION forming part of Letters Patent No. 667,320, dated February5, 1901. Application filed October 16, 1900. Serial No. 33,208. (Nomodel.)

To all whom, it may concern:

Be it known that I, ARTHUR J UNGHANS, a subject of the Emperor ofGermany, residing at Schramberg, Wiirtemberg, in the Empire of Germany,have invented an Improved Alarm-Clock, of which the following is a full,clear, and exact description.

In alarm-clocks as hitherto constructed it has been necessary in orderto check the operation of the alarm to give a horizontal movement to anarm situated under the bell or gong, so as to arrest or hold the hammer,and that such hammer should be afterward released by hand, so that thealarm might again come into operation. The release of thehammer-arresting device is according to the present invention effectedautomatically and insured by simply winding up the alarm works ormovement.

One of the distinguishing features of the improved arrangement is theemployment of an arresting device, such as a lever, the return of whichto its inoperative position is made automatically and is dependent uponthe act of winding the alarm mechanism. The fact that during thiswinding process the alarm escape-wheel has a rearward rotary movement isutilized in elfecting the automatic release above described. One form ofthe improved construction is represented by way of example in theaccompanying drawings, in which- Figures 1 and 3 are rear elevations ofthe works, illustrating the inoperative and operative positions of thealarm mechanism, respectively. Fig. 2 is a cross-section, partly brokenaway; and Fig. 4 is a top view or plan of the arresting-lever.

The alarm-bell q (shown in section at Figs. 1, 2, and 3) is capable ofbeing depressed in opposition to the pressure of a spring p, coiledaround the pillar a, carrying the seat for the bell, and by thismovement effecting a sudden discontinuance of the operation of the alarmwhenever the alarm-train is ringing the bell. A spring-arm orspring-operated lever o is rigidly secured at one end to the clock-frameby a nut n. This arm or lever normally springs upward by its ownresiliency to the position shown in Fig. 3, and it is preferably formedlike a letter U, as

shown in Fig. 4. The free end of the springarm 1) is provided with apush-piece it, which projects upward into close proximity to the crownof the bell. The arm 1; is provided with a downwardly-projecting tooth2', which it normally holds clear of the teeth of the alarmescapement-wheel Z. While the alarmworks are running down, thisescape-wheel turns in the direction of the arrow indicated in Fig. 3. Bydepressing the bell the springcontrolled or resilient lever 11 is moveda little distance downward, and the said tooth or pawl .2 comes intoengagement with one of the teeth of the alarm escape-wheel Z, wherebysuch escape-wheel is arrested, and the lever 1) itself is at the sametime held down by the pressure of the tooth of theescape-wheel actingupon the point of the tooth or pawl z in the right direction. After therelease of the bell g, which as soon as released springs back to theposition shown in full lines, the lever o continues in its arrestedposition, as shown in Figs. 1 and 2, and not until the winding-arbor 0commences to be turned, and thereby imparts a rearward rotary movementto the escape-wheel l inversely to the direction of the arrow shown inFig. 3, does the tooth 2 become released, so that thelever 1) may springback to its initial raised position, as shown in Fig. 3, whereupon thealarm is restored to its operative position. Thus it will be seen thatthe object accomplished by the arrangement described is to enable thealarm-works automatically to resume their operative position and withoutnecessitating any special setting or adjustment by hand, the backlash ofthe escape-wheel in the process of winding being utilized in lieuthereof. The lever u 1) may, however, be thrown into operation otherwisethan by the depression of the bell q.

What I claim as my invention, and desire to secure by Letters Patent,is-

1. In an alarm-clock, the combination, with one of the toothed wheels ofthe alarm-train, of a tooth, a spring normally holding the said toothout of contact with the said wheel, and means for moving the said toothinto the forward path of one of the teeth of the said wheel against thepressure of the said spring, whereby the said tooth and wheel becomeinterlocked until the said Wheel is moved in the reverse direction inrewinding the alarmtrain, substantially as set forth.

2. In an alarm-clock the combination, with one of the toothed Wheels ofthe alarm-train, of a spring-arm rigidly secured at one end and providedwitha tooth which it normally holds out of contact With the said wheel,and means for bending the said spring-arm so as to place its said toothinto the forward path of one of the teeth of the said Wheel, whereby thesaid spring-arm and Wheel become interlocked until the said Wheel ismoved in the reverse direction in rewinding the alarm, substantially asset forth.

